Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
권호 표지
DOI QR코드

DOI QR Code

Microstructures and Mechanical Properties of Repair Materials Using CSA and ACA-based Binders

CSA 및 ACA계 결합재를 적용한 보수재료의 미세구조 및 역학적 성능

  • Seung-Tae Lee (Department of Civil Engineering, Kunsan National University) ;
  • Hoon-Shin Chung (Department of Civil Engineering, Kunsan National University) ;
  • Tae-Han Kwon (Department of Civil Engineering, Kunsan National University) ;
  • Yong Kim (Department of Civil Engineering, Kunsan National University)
  • 이승태 (군산대학교 토목공학과) ;
  • 정훈신 (군산대학교 토목공학과) ;
  • 권태한 (군산대학교 토목공학과) ;
  • 김용 (군산대학교 토목공학과)
  • Received : 2023.07.17
  • Accepted : 2023.07.31
  • Published : 2023.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, microstructures and mechanical properties of repair materials using calcium sulfoaluminate (CSA) and/or amorphous calcium aluminate (ACA) cements were experimentally investigated. By XRD ansysis, the hydrates formed in repair materials were identified. In addition, the microstructures of repair materials were visually examined through SEM observation. Setting time of mortars made with repair materials were measured. The strength development and ultrasonic velocity of the mortars were also evaluated at the predetermined ages. As a result, it seems that ACA showed a benefit effect with respect to mechanical properties of mortars.

Keywords

Acknowledgement

본 논문은 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었습니다(과제번호 RS-2022-00142566). 이에 감사드립니다.

References

  1. Aitcin, P.C. (2000). Cement of yesterday and today concrete of tomorrow, Cement and Concrete Research, 30, 1349-1359. https://doi.org/10.1016/S0008-8846(00)00365-3
  2. Bernardo, G., Telesca, A., Valenti, G.L. (2006). A porosimetric study of calcium sulfoaluminate cement pastes cured at early ages, Cement and Concrete Research, 36(6), 1042-1047. https://doi.org/10.1016/j.cemconres.2006.02.014
  3. Bye, G.C. (1999). Portland cement, 2nd Ed. Thomas Telford, 206.
  4. Hargis, C.W., Kirchheim, A.P., Monterio, P.J.M., Gartner, E.M. (2013). Early age hydration of calcium sulfoaluminate in the presence of gypsum and varying amount of calcium hydroxide, Cement and Concrete Research, 48, 105-115. https://doi.org/10.1016/j.cemconres.2013.03.001
  5. Hargis, C.W., Telesca, A., Monteiro, P.J.M. (2014). Calcium sulfoaluminate hydration in the presence of gypsum, calcite, and vaterite, Cement and Concrete Research, 65, 15-20. https://doi.org/10.1016/j.cemconres.2014.07.004
  6. Hwang, J.N., Lee, S.T., Park, K.P., Ha, S.W. (2018). Performance of combined organic and inorganic hybrid mortars as repair materials for concrete road facilities, International Journal of Highway Engineering, 20(6), 109-116. https://doi.org/10.7855/IJHE.2018.20.6.109
  7. Hyun, J.H., Noh, J.H., Kim, H.S., Kim, Y.Y. (2017). Durability characteristics of Latex modified concrete for bridge deck pavement produced with CSA-based admixture for traffic opening at the age of 24 hours, Journal of the Korea Concrete Institute, 29(6), 625-631. https://doi.org/10.4334/JKCI.2017.29.6.625
  8. Kim, M.G., Sung, J.G. (2008). Application of mobile mapping system for effective road facility maintenance and management, Korean Journal of Remote Sensing, 24(2), 153-164.
  9. Moura, M.A.N., Junior, A.L.M., Ferreira, G.C.S. (2023). Ultrasonic testing on evaluation of concrete residual compressive strength: A review, Construction and Building Materials, 373, 130887.
  10. Nakagawa, K., Terashima, I., Asaga, K., Daimon, M. (1990). Influence of Ca(OH)2 and CaSO4.2H2O on hydration reaction of amorphous calcium aluminate, Cement and Concrete Research, 20(5), 824-832. https://doi.org/10.1016/0008-8846(90)90016-Q
  11. Vasquez, I.B., Trauchessec, R., Tobon, J.I., Lecomte, A. (2020). Influence of ye'elimite/anhydrate ratio on PC-CSA hybrid cements, Materials Today Communications, 22, 100778.